The organelle helping in penetrating of sperm into egg during fertilization is

The correct option is lysosome.

During the process of fertilization, a sperm cell must penetrate the protective outer layers surrounding the egg cell to fuse with its membrane. This penetration is facilitated by a specialized cap-like structure located at the front of the sperm head, known as the acrosome.

The acrosome is a modified, membrane-bound organelle that originates from the Golgi apparatus during sperm development. Structurally and functionally, it is considered a specialized type of lysosome because it contains a rich cocktail of hydrolytic enzymes (acid hydrolases), including hyaluronidase and acrosin.
When the sperm contacts the outer layers of the egg, it undergoes the acrosomal reaction, releasing these digestive enzymes. The enzymes dissolve the protective glycoprotein matrix of the egg (specifically the corona radiata and the zona pellucida), clearing a path that allows the sperm to penetrate and fertilize the egg.